摘要
基于格子玻尔兹曼方法(Lattice Boltzmann Method,LBM)建立了裂隙煤体内瓦斯压力分布的二维动力学模型,并对瓦斯压力在空间上的分布和时间上的演化规律进行了模拟研究。结果表明,瓦斯压力分布与煤壁暴露的时间和所处的空间位置有关:煤壁的暴露时间越长,煤壁处的瓦斯压力梯度越小,流场内瓦斯压力的变化范围越大;在空间上瓦斯压力呈二次曲线分布,这与已有的理论分析和实测的结果相吻合,表明LBM方法可为研究瓦斯在煤层中的运移规律提供新的计算方法。
A new dynamic model for the simulation of two-dimensional gas pressure in fissured coal was established based on Lattice Boltzmann method(LBM),and simulation study was made on the spatial distribution and time evolvement of gas pressure,the simulation results indicated that the gas pressure distribution is related to the exposure time and the position of coal wall;the longer the exposure time of coal wall,the smaller the gas pressure gradient at the coal wall and the larger the variation range of gas pressure in gas flow fluid.The spatial gas pressure was in a quadratic curve distribution.The simulation results are consistent with the theoretical analysis and experimental results.This showed that LBM is a new calculation method for studying gas migration regularity in coal seam.
出处
《矿业安全与环保》
北大核心
2009年第1期7-9,13,共4页
Mining Safety & Environmental Protection
基金
国家自然科学基金项目(50534080
50674063)
国家重点基础研究计划(973计划)项目(2005CB221502)
山东省自然科学基金项目(Y2004F11)
山东科技大学科学研究基金项目(2008AZZ088)
